Process for preparing oil and/or gum and/or silicone resin...

Details Process for preparing oil and/or gum and/or silicone resin... Process for preparing oil and/or gum and/or silicone resin...

C - Chemistry, Metallurgy

08

J

C08J 3/05 (2006.01) C08J 3/03 (2006.01)

Patent

CA 2147353

A method for preparing oil-in-water emulsions of oils, gums or silicone resins by kneading a mixture of (1) a silicone phase (A) with a viscosity of at least 3 Pas or a consistency of at least 200, and (2) an aqueous phase comprising water, at least one surfactant (B) and optionally at least one water-soluble thickening polymer (C), wherein the relative amounts of water, (B) and optionally (C) are such that the aqueous phase preferably has at least as much viscosity or consistency as the silicone phase (A), said kneading being performed for a sufficient time and with sufficient shear to give an oil-in-water emulsion having a particle size of 0.1-5mum; and optionally by diluting the medium in water.

Procédé de préparation d'émulsions aqueuses d'huiles, gommes ou résines silicones par malaxage d'un mélange constitué (1) d'une phase silicone (A) de viscosité au moins égale à 3 Pa.s. ou de consistance d'au moins 200 et (2) d'une phase aqueuse constituée d'eau, d'au moins un agent tensio-actif (B) et éventuellement d'au moins un polymère hydrosoluble épaississant (C), les quantités relatives d'eau, de (B) et éventuellement (C) étant telles que la viscosité ou consistance de la phase aqueuse soit de préférence au moins égale à celle de la phase silicone (A), le malaxage étant réalisé pendant une durée et avec un cisaillement suffisants pour obtenir une émulsion de type "huile dans eau" de granulométrie de 0,1 à 5µm, puis dilution éventuelle du milieu avec de l'eau.

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